Which vendors sell Thymalin with independent COA testing?

10 vendors in the Merit Verified directory have independent COA evidence on file for Thymalin — 28 COAs total. COA coverage and test dates are listed on the Thymalin page at https://meritverified.org/peptides/thymalin.

How do I verify the quality of Thymalin from a vendor?

To verify Thymalin quality, look for an independent certificate of analysis (COA) from a third-party lab — not a lab the vendor owns or pays directly. The COA should state the tested compound, lot number, purity percentage (identity and concentration), and the lab's name. Cross-reference the lot number against the vendor's current stock. Merit Verified indexes COAs for Thymalin at https://meritverified.org/peptides/thymalin so you can compare evidence across vendors before buying.

What is the regulatory status of Thymalin?

Thymalin is tracked in the Merit Verified registry. Regulatory status for research peptides in the US has been evolving — the FDA has reclassified a number of peptides out of the 503A compounding ingredient list since 2025. Merit Verified does not provide legal or regulatory advice; check official FDA sources or consult a licensed professional for the current status of Thymalin in your jurisdiction.

Immune Modulator

Thymalin

Also known as: thymalinum

Thymalin is a heterogeneous polypeptide extract from calf thymus (a mixture, not a single defined peptide) developed in the 1970s by V. Kh. Khavinson and V. G. Morozov at the Military Medical Academy / St. Petersburg Institute of Bioregulation and Gerontology. Registered as a pharmaceutical in the USSR/Russia for immunocorrection. Distinct from Thymulin (Bach's zinc-dependent nonapeptide pGlu-Ala-Lys-Ser-Gln-Gly-Gly-Ser-Asn, originally called FTS) and from Thymosin alpha-1 (a 28-amino-acid synthetic peptide). Not FDA-approved in the US; research-use only.

Where to buy · live market data

Who's worth your money for Thymalin

Every current seller, ranked by independent evidence — Merit Score, latest COA purity, and live $/mg (size-normalized). Prices refresh daily. Rankings are never paid.

Top Merit pick

🇺🇸 Profound Aminos 95

Highest Merit Score (95) of 10 scored sellers

$4.60/mg

$46.00 · 10mg · 99.2% purity

1 COA

Buy

Best value

🇺🇸 Soma Peptides 89

Lowest $/mg among scored sellers

$1.79/mg

$179 · 100mg · 100.0% purity

1 COA

Buy

Most tested

🇺🇸 Verified Peptides 86

14 independent COAs on file

$3.60/mg

$36.00 · 10mg · 99.6% purity

14 COAs

Buy

Average price

$3.97/mg

range $0.64–$6.32/mg

Sellers

from $30.00

45-day trend

-30.4%

vs 45-day avg $/mg

21 of 28 sellers have a current price· 4 stale hidden· 7 unverified hidden

	Vendor	Price	$/mg	vs avg	Purity	COAs	Merit
🇺🇸	Profound Aminos via Disclosed Labs · 1h ago	$46.00· 10mg	$4.60/mg	+16%	99.2%	1	95	Buy
🇺🇸	Ion Peptide ✓ verified at source · 1h ago	$59.00· 10mg	$5.90/mg	+48.8%	99.2%	2	95	Buy
🇺🇸	Peptide Crafters ✓ verified at source · 1h ago	$45.00· 10mg	$4.50/mg	+13.5%	99.8%	1	94	Buy Code CRAFTERS10 · 10% off
🇺🇸	Soma Peptides ✓ verified at source · 1h ago	$179· 100mg	$1.79/mg	-54.9%	100.0%	1	89	Buy
🇺🇸	Ruo Bio ✓ verified at source · 1h ago	$40.00· 20mg	$2.00/mg	-49.6%	—	1	88	Buy
	Welli Labs via Disclosed Labs · 1h ago	$405· 100mg	$4.05/mg	+2.1%	—	—	87	Buy
🇺🇸	Verified Peptides via Disclosed Labs · 1h ago	$36.00· 10mg	$3.60/mg	-9.2%	99.6%	14	86	Buy
🇺🇸	Simple Peptide via Disclosed Labs · 1h ago	$84.00· 20mg	$4.20/mg	+5.9%	99.7%	1	85	Buy
	Modern Research Peptides via Disclosed Labs · 1h ago	$45.99· 11.02mg	$4.17/mg	+5.2%	99.8%	1	82	Buy
🇺🇸	Southern Aminos via Disclosed Labs · 1h ago	$63.20· 10mg	$6.32/mg	+59.4%	—	—	82	Buy Code MERIT · 15% off

Top Merit pick

🇺🇸 Profound Aminos
via Disclosed Labs · 1h ago
95

$4.60/mg +16% vs avg

$46.00

10mg

99.2% purity 1 COA

Buy
🇺🇸 Ion Peptide
✓ verified at source · 1h ago
95

$5.90/mg +48.8% vs avg

$59.00

10mg

99.2% purity 2 COAs

Buy
🇺🇸 Peptide Crafters
✓ verified at source · 1h ago
94

$4.50/mg +13.5% vs avg

$45.00

10mg

99.8% purity 1 COA

Buy Code CRAFTERS10 · 10% off
🇺🇸 Soma Peptides
✓ verified at source · 1h ago
89

$1.79/mg -54.9% vs avg

$179

100mg

100.0% purity 1 COA

Buy
🇺🇸 Ruo Bio
✓ verified at source · 1h ago
88

$2.00/mg -49.6% vs avg

$40.00

20mg

no purity 1 COA

Buy
Welli Labs
via Disclosed Labs · 1h ago
87

$4.05/mg +2.1% vs avg

$405

100mg

no purity

Buy
🇺🇸 Verified Peptides
via Disclosed Labs · 1h ago
86

$3.60/mg -9.2% vs avg

$36.00

10mg

99.6% purity 14 COAs

Buy
🇺🇸 Simple Peptide
via Disclosed Labs · 1h ago
85

$4.20/mg +5.9% vs avg

$84.00

20mg

99.7% purity 1 COA

Buy
Modern Research Peptides
via Disclosed Labs · 1h ago
82

$4.17/mg +5.2% vs avg

$45.99

11.02mg

99.8% purity 1 COA

Buy
🇺🇸 Southern Aminos
via Disclosed Labs · 1h ago
82

$6.32/mg +59.4% vs avg

$63.20

10mg

no purity

Buy Code MERIT · 15% off

Prices observed from public storefronts (last 24h), normalized to $/mg. "Evidence" is Merit's 0–100 Merit Score, derived only from observable verification evidence (methodology on /about); "Purity" is the latest independent COA. Some buy links are affiliate links — Merit may earn a commission at no extra cost to you, and where a vendor offers one, the code shown gets you a discount at their checkout. Affiliate status never affects price data, ranking, or the Merit Score (full policy on /disclosure). Research use only.

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Compound reference

About Thymalin

CAS

—

Molecular formula

—

Typical dose range

5-10 mg/day intramuscular or subcutaneous, for 10-20 consecutive days per cycle

Half-life

~30 minutes (peptide components); biological effects persist 48-72 hours

Independent evidence

COAs for Thymalin

28 third-party tests across 10 vendors. Each card links to the full report.

All 28 COAs for Thymalin →

Measured purity over time

Thymalin

Who's worth your money for Thymalin

Watch Thymalin

About Thymalin

COAs for Thymalin

12 citations indexed for Thymalin

Epitalon and Epithalamin: A Narrative Review of Mechanistic, Preclinical, and Clinical Evidence

Targeting Leukopoiesis: Pharmacological and Biotechnological Strategies for the Treatment of Leukopenia

Reparative osteogenesis in mandible in cases of filling a bone defect with hydroxyapatite-containing osteotropic material and injecting the surrounding soft tissues with thymalin: experimental and morphological study

Expression features of T-lymphocytes, B-lymphocytes and macrophages in the post-traumatic regenerate of the mandible rats under conditions of filling a bone defect with hydroxyapatite-containing osteotropic material and thymalin injecting the surrounding soft tissues

The Influence of KE and EW Dipeptides in the Composition of the Thymalin Drug on Gene Expression and Protein Synthesis Involved in the Pathogenesis of COVID-19

[Morphological compound and indicators of the blood clotting system in severe COVID-19 patients of middle aged and elderly during treatment of Tocilizumab and Thymalin.]